Bobbin



March 1, 1949.

C W.'GEIER ET AL BOBBIN C. W 6515/? A. L. JOSLIN Fil ed Oct. 4, 1946 IN V EN TOR.

Mme/var Patented Mar. l, 1%?

UNITED STATES PATENT OFFICE BOBB'IN Conrad W. Geier and Asher L. J oslin,

Robbins, N. C.

Application October 4, 1946, Serial No. 701,384

3 Claims.

This invention relates to a bobbin, and more especially to abobbin having a base portion, a cylindrical portion, and a yarn receiving portion, the base portion having rings therearound whereby it can be inserted into a shuttle spring for holding the bobbin in position, and said bobbin having between the base portion and the yarn receiving portion a cylindrical portion, which has the same diameter as the spaced rings around the butt or base of the bobbin, said bobbin also having a metallic bushing in its butt portion whereby the butt portion and -the cylindrical portion combined are heavier than the yarn receiving portion of the bobbin, together with the yarn thereon, so that the bobbin when lying on a fiat surface will have its butt portion heavy enough to sustain the weight of the yarn without the yarn touching an adjacent surface and chafing as a result of rubbing.

Also, the bobbin, when filled with yarn, and placed in a loom, such as a Crompton and Knowles box loom, will cause the butt and cylindrical portions to rest against each other and thus prevent the yarn on adjacent bobbins from touching, thus protecting the yarn. The bobbin, also, is adapted to be used with a transfer arm, which has one point which engages the rings for transferring the bobbin, and also has an extension which instead of engaging the yarn during the transfer operation and damaging the same, engages the cylindrical intermediate portion of the bobbin, instead of the yarn, thus preventing the yarn from being damaged during a transfer operation.

In a magazine loom, such as a Crompton and Knowles, S-5 type of loom, where this bobbin is best adapted to be used, this type of loom has a magazine and the filling bobbins are held in position by two almost vertical U-shaped guides, one at the butt and the other at the end of the bobbin. The first bobbin stops at the bottom of the guide, being held there by giveaway or releasable stops. The next bobbin rests on top of the first bobbin, and so on, and there are several bobbins placed on upon the other, and in the old type of bobbin, the yarn on each bobbin is in contact with the yarn on the bobbin bothabove and below the same. At time of transfer, a transfer arm strikes the bottom bobbin and forces it through the releasable stop and into the shuttle. This transfer arm strikes the bobbin in two places, one place at the butt, and the other about half-way to the tip of the yarn, striking the yarn in the old-type bobbin.

' After the bottom bobbin is transferred, the bobbins in the magazine all slide down the guides by gravity so that the previous second bobbinbecomes the first one, andis ready for the next transfer. All other bobbins slide down to the position of the bobbin previously just below it.

During this transfer operation, the section of the transfer arm striking theyarn has an extended side which holds the second bobbin from sliding down the guide until the transfer arm is back in its inoperative position. Consequently, the yarn of the transferred bobbin is struck by the face of the transfer arm, and the yarn on the second bobbin is rubbed by the side of the transfer arm on each transfer when the old type bobbin and the old type transfer arms are used.

This section of thetransfer arm which contacts the yarn also guides the tip sections of the bobbin to their proper position in the shuttle during transfer, the position of the butt of the bobbin being governed by the butt section of the transfer arm.

'When the bobbin is not fully wound with yarn,

the Wound diameter of the yarn on the bobbin is, of course, smaller. This results in the tip of the bobbin not being forced to its proper position during the transfer. This condition, in turn, because the bobbin is not being properly placed in the shuttle, isliable' to cause breakage of" loom parts and failure of the shuttle to thread up properly. Most of these occur in the pick immediately following transfer.

The new'type of bobbin enables a satisfactory, automatic transfer, with a partly filled bobbin for the reason that a section of the transfer arm, which would ordinarily strike the yarn, is made shorter and is caused to strike the enlarged cylindrical section between the yarn receiving portion of the bobbin and the butt portion of the bobbin. Therefore, the amount of yarn on the bobbinhas no effect on the guiding of the bobbinduring transfer, as it ordinarily does in the types of bobbins heretofore used.

This new type of bobbin prevents damage to the yarn for the reason that the bobbins will be resting against each other in the magazines, and having the cylindrical portions of each bobbin in contact with each other, ratherth'anthe yarn, as it does in the old type of bobbin heretofore used. The weighted bushing at the butt section'of this improved bobbin will over-balance the weight of the yarn on the bobbin, and'thus assuring that no contact betweenthe yarns of adjacent bobbins will take place.

By the use of the new type bobbin and a shorter extension on the transfer arm, daniage'to yarn all contact of the yarn by the transfer arm is eliminated with this new type of bobbin. The arm contacts rather the butt portion of the bobbin as heretofore, and cylindrical portion disposed between the butt portion and the yarn receiving portion of the bobbin.

By eliminating the part currently played by the yarn and properly guiding the bobbin to a complete transfer, partially filled bobbins-may be transferred successfully, which result has'not been action of the .shuttle is improved because of the uniform control of the bobbin during transfer, regardless of the amount of yarn on the bobbin,

which control varies according to the amount of yarn on the bobbin with the old type of bobbin heretofore used.

It is therefore an object of this invention to provide an improved bobbin having a butt portion with spaced rings therearound, and having a yarn receiving portion, and having a cylindrical portion; disposed between the butt portion and the yarn receiving portion, which cylindrical portion has a diameter greater than the diameter of the yarn wound on the yarn receiving portion of the bobbin; and which cylindrical portion is of substantially the same diameter as the rings on thebutt portion of the bobbin; and said butt portion of the bobbin having disposed therein a hollow metallic bushing, which not only increases thelilife of the bobbin, but which also gives the necessary added weight thereto, so that the point of balance of the bobbin, when it is filled with yarn, is-disposed'at a point along the cylindrical portion, so that this cylindrical portion and the butt portion will outweigh the other portion of the bobbin and the yarn thereon, and thus prevent the bobbin from tilting and allowing its "yarn to chafe against an adjacent object as the butt portion of the bobbin and cylindrical portion support the entire weight of the yarn without the bobbin tilting in any manner to chafe the yarn.

Some or the objects of the invention having been stated, other objects will appear as the des'cription proceeds when taken in connection with theaccompanying drawings, in which Figure 1 is an elevation of the bobbin lying on asupporting surface;

Figure 2 is a longitudinal, sectional view: through the bobbin, and taken along the line 22 in'Figure 1;

Figure 3 is a cross-sectional view, taken along theline 3-3 in Figure 1;

Figure 4 is a cross-sectional View, taken along; the line 4-4 in Figure 1; Figure 5 is a sectional view taken along the line 5'5 in Figure 1.

Y Referring more specifically to the drawings, the' numerical Ill indicates the base portion of the 1 bobbin, which has three spaced rings, I I, I2, and

I3, clamped therearound in a conventional man- 1 her, saidpringsusually being divided as at M, and slightly-imbedded in the wooden base portion 1 0. fi Thewbobbinhas a cylindrical bore in its base pori-t diametter zthan the base portion iii :isJa cylindrical portion 22, which has "a "diameter substantially the same as the diameter of the spaced rings ll, i2, and it. The spaced rings II, It, and iii, of course, are conventional and are adapted to fit into suitable cavities in a spring clamp, disposed within a shuttle, for holding the bobbin in the shuttle during a weaving operation. The yarn is adapted to be wound on the portion 20 of the bobbin and is filled out usually to the dotted line indicated at 23. The diameter of the yarn on the portion 28 is slightly less than the diameter of the barrel or cylindrical portion 22.

The combined weight of the baseportion and the bushing together with the barrel portion I5 is greater than the weight of the yarn receiving portion 2i), together with the yarn thereon The balance point of the bobbin filled with yarn is approximately at the point indicated by-thearrow it. .The dotted line 25 indicates a flat supporting surfacaand shows how theyarn -on thebobbin would not touch the supporting surface.

It is thus seen that when the bobbinis'fully loaded with yarn that the weight of the butt portion of the bobbin will be sufficient to holdthe of the invention bein defined in the claims.

We claim: 1.; Abobbin comprising a yarn receiving portion and a cylindrical-portion adjacent oneendof the yarn receiving portion, and a. ,butt,.;porti0n having spaced rings therearound forfitting into the spring of a: shuttle, the cylindricalvportion being ofgreater diameter than the-yarn wound -onto-:the..:yarn receiving portion and being; sub- 'greaterthan the yarnreceivin portiontc ether with the yarn thereon, so as topreventthe yarns ongadj acent bobbins:- from chafi-ngby-contactwith each other.

2; Abobbin having a base portion and a yarn receiving portion, saidbase portion comprising a cylindrical section of greater diameter than the yarn wound on the yarn receiving portion, and

longitudinally therethrough, and a metallic cylindrical bushing mounted in the bore in the-base ofwthe. bobbin to'give {added :weight to -thebase portion of the bobbin. v

Y A bobbin comprising ayarn receivingyportion and a cylinrdicalportion adjacent one end of the yarn receiving portion, and a base portion having spaced rings therearound for fitting into the spring of a shuttle, the cylindrical portion being of greater diameter than the yarn wound onto the yarn receiving portion and being substantially of the same diameter as the rings on the base of the bobbin, the weight of the base of the bobbin and the cylindrical portion being greater than the yarnreceiving portion together with the yarn thereon, so as to support the yarn out 10 of contact with a supporting surface, and to prevent the yarns on adjacent bobbins from chafing by contact with each other, the bobbin having a bore extending longitudinally therethrough, and a 6 cylindrical bushing mounted in the bore in the base of the bobbin to give added weight'to the base portion of the bobbin.

' CONRAD W. GEIER.

ASHER L. JOSLIN.

REFERENCES CITED :FOREIGbI PATENTS Country Date Great Britain June 11,1903

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